Ariana Grande Laughs Her Way Through Duet With Mac Miller: Watch

Ariana Grande joined boyfriend Mac Miller on stage for a performance of "My Favorite Part" to promote Miller's The Divine Feminine Tour.

It kicks off Oct. 13 in Indiana, PA, so prepare for more of the same.

At times, the pop star can barely make it through without bursting into laughter, but for the most part another solid performance from the T-Mobile heroine. Ah, young love.

Thoughts? Let us know in Exhale.

And while you're at it... leave a comment and follow us on Facebook, Twitter & Instagram.